Improvement in calks for horseshoes



UNITED STATES PATENT OFFICE.

JOHN H. JENNINGS, OF NEW BEDFORD, MASSACHUSETTS.

IMPROVEMENT IN CALKS FOR HOYRSESHOES.

To all whom it may concern:

Be it known'that I, JOHN H. J nNNrNGs, M. D., of New Bedford, in the county of Bristol and State of Massachusetts, have-invented a new and useful ImprovementV in Shoes for either Horses or Cattle; and I do hereby declare the same to be fully described in the following specification and illustrated in the accompanying drawings, of which* Figure l is an under side view, and Fig. 2 an edge view, of a horseshoe provided with my invention. plate without the calks. Fig. 4. is a section taken through the toe of the shoe and the pivot-screw of its toe-calk. Fig. 5 is a transverse section taken through the key-screws of the toe-calk. Fig. 6 is a longitudinal section of one of the heel-calks and the heel part of the shoe to which it is affixed. Figs. 7 and 8 are perspective views of a heel and a toe calk. y

The principal object of my invention is to enable the calks of a horseshoe to be readily affixed to or removed from the shoe while it may be fastened on the foot of the animal,

my invention saving the necessity of detaching the shoe from the foot, and subsequently reattaching it thereto, operations which are requisite when calks are to be afiixed to the shoe by the welding process.

In thedrawings, A exhibits the body part of a horseshoe, it beingl provided with the usual nail-holes, a a c, and their creases b b. It is also made not only with'three screwholes, c d d, arranged at the toe, but two othf ers-viz. e f, formed through ach heel, their arrangement being as exhibited in Fig. 3. Each of the screw-holes is to be made as a fe male screw to receive a male screw.

B C C are the toe and heel calks, each being made with a iiange, g, projecting laterally from it and flattened, so as to rest on the face of the shoe and supportthe calks by a broad base. Amale screw, h, termed a pivot-screw,7 projects from the middle of the base of each calk, and with such calk is formed in one piece, or may be welded to the calk. This pivot-screw is intended to enter one of the screw-holes c or f, and is to be screwed therein until the calk and its flange Fig. 3 is a view of the shoe-V specification forming pm of Letters Patent No. 32,371, dated May 21, 1861.

are brought firmly into contact with the shoe.

Next, in order to prevent the calk from turning around in the shoe, as well as to further fix the two together, I employ one or more key-screws, D, to each calk, one in most cases .being sufficient for each heel-calk, while two of them may be used in the flange of the toecalk. Each of these key-screws is a cylindrical piece of metal, formed with a prismatic key-hole, i, and with a:screwthread cut in the cylindrical surface of such piece of metal, the length of the cylinder being equal to a little less than the thickness of the shoe and\ that of the flange of the calk. A key-screw is screwed through each of the flange-holes of the calk and into the shoe until the outer end of the screw may be flush, or about so, with the surface of the iiange, the insertion of the screw being effected by means ofa key suitably formed. Subsequently the keyhole or socket of each screw should be stopped by a piece of gutta-percha, cork, or india-rubber driven closely therein.

From the above it will be seen that the pivot-screw, which being, by reason of its situation, properly protected from injury, is supported bythe key-screw, and is prevented thereby from turning around on its female screw. Thus the calk is firmly iixed to the shoe by means of thepivot-screw, the flange, and the key-screw or screw. By making the key-screw without a head it is not only rendered less liable to be injured while the shoe may be in use, but it admits of the calk being used to the best advantage. The iiange of the calk serves to stiften and brace both the shoe and the calk; and, furthermore, my im` provement admits of the shoe being fastened to the horses foot by nails driven through the toe part of the shoe.

With my improvement or mode of making and applying or afxing a calk a dulled or damaged calk may be easily removed from and either a sharp calk or what is termed a blunt7 7 be applied to a shoe at' any time while fastened to the hoof of an animal, whether such be a horse or an ox, as my invention is equally applicable to the shoes of most kinds of cattle or draftanimals- By means of my invention much manual labor and mnch danger or liability of injury to a horse is saved, as when the shoe has been Once affixed to his foot it does not need to be' The above-described application ofthe ealk to the shoe-Viz., by means not only ofa flange and a pivot-screw attached to and projecting from the ealk, and with the latter screwed into theshoe, but by one or more key-screws extended throngh the calk-flange and into the shoe, and made substantially as specified.

JOHN H. JENNINGS. 

